661200152 has 32 divisors (see below), whose sum is σ = 1310817600. Its totient is φ = 311804064.

The previous prime is 661200151. The next prime is 661200179. The reversal of 661200152 is 251002166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661200151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24923 + ... + 44085.

It is an arithmetic number, because the mean of its divisors is an integer number (40963050).

Almost surely, 2^661200152 is an apocalyptic number.

It is an amenable number.

661200152 is a deficient number, since it is larger than the sum of its proper divisors (649617448).

661200152 is a wasteful number, since it uses less digits than its factorization.

661200152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415 (or 19411 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 661200152 is about 25713.8124750104. The cubic root of 661200152 is about 871.1861883776.

The spelling of 661200152 in words is "six hundred sixty-one million, two hundred thousand, one hundred fifty-two".